The key to security risks assessment in rural power network is hazards assessment, it is very important to select a proper assessment methods. Based on comparative study of characteristic, applicable condition and application scope of operating conditions hazard assessment method(LEC), risk assessment code method(RAC), Fault type and effect analysis (FMEA), Event Tree Analysis(ETA) and etc, the paper propose that LEC and RAC are appropriate methods for security risks assessment of rural power network, the example shows its applicability and effectiveness. The conclusions offer a reference for security risks of rural power network.